import pygame
import time
import random

pygame.init()

# 定义颜色
white = (255, 255, 255)
yellow = (255, 255, 102)
black = (0, 0, 0)
red = (213, 50, 80)
green = (0, 255, 0)
blue = (50, 153, 213)

# 设置窗口
width = 600
height = 400
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('贪吃蛇游戏')

# 控制蛇的速度
snake_block = 10
snake_speed = 15

# 字体设置
font_style = pygame.font.SysFont("bahnschrift", 25)
score_font = pygame.font.SysFont("comicsansms", 35)

def our_snake(snake_block, snake_list):
    for x in snake_list:
        pygame.draw.rect(screen, black, [x[0], x[1], snake_block, snake_block])

def message(msg, color):
    mesg = font_style.render(msg, True, color)
    screen.blit(mesg, [width / 6, height / 3])

def generate_obstacles(num_obstacles):
    obstacles = []
    for _ in range(num_obstacles):
        obs_x = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
        obs_y = round(random.randrange(0, height - snake_block) / 10.0) * 10.0
        obstacles.append((obs_x, obs_y))
    return obstacles

def gameLoop():
    game_over = False
    game_close = False

    x1 = width / 2
    y1 = height / 2

    x1_change = snake_block  # 初始向右移动
    y1_change = 0

    snake_List = []
    Length_of_snake = 1

    foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
    foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

    obstacles = generate_obstacles(5)  # 生成 5 个障碍物

    while not game_over:
        while game_close:
            screen.fill(blue)
            message("你输了! 按C继续玩或按Q退出", red)
            pygame.display.update()

            for event in pygame.event.get():
                if event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_q:
                        game_over = True
                        game_close = False
                    if event.key == pygame.K_c:
                        game_close = False  # 重置游戏状态
                        Length_of_snake = 1
                        snake_List.clear()
                        x1 = width / 2
                        y1 = height / 2
                        foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
                        foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0
                        obstacles = generate_obstacles(5)

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                game_over = True

        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT]:
            x1_change = -snake_block
            y1_change = 0
        elif keys[pygame.K_RIGHT]:
            x1_change = snake_block
            y1_change = 0
        elif keys[pygame.K_UP]:
            y1_change = -snake_block
            x1_change = 0
        elif keys[pygame.K_DOWN]:
            y1_change = snake_block
            x1_change = 0

        x1 += x1_change
        y1 += y1_change

        if x1 == foodx and y1 == foody:
            Length_of_snake += 1
            foodx = round(random.randrange(0, width - snake_block) / 10.0) * 10.0
            foody = round(random.randrange(0, height - snake_block) / 10.0) * 10.0

        # 边界穿越逻辑
        if x1 >= width:
            x1 = 0
        elif x1 < 0:
            x1 = width
        elif y1 >= height:
            y1 = 0
        elif y1 < 0:
            y1 = height

        screen.fill(blue)
        for obs in obstacles:
            pygame.draw.rect(screen, red, [obs[0], obs[1], snake_block, snake_block])
        pygame.draw.rect(screen, green, [foodx, foody, snake_block, snake_block])
        snake_Head = [x1, y1]
        snake_List.append(snake_Head)
        if len(snake_List) > Length_of_snake:
            del snake_List[0]

        for x in snake_List[:-1]:
            if x == snake_Head:
                game_close = True

        our_snake(snake_block, snake_List)
        pygame.display.update()

        clock.tick(snake_speed)

    pygame.quit()
    quit()

clock = pygame.time.Clock()
gameLoop()